Monkey-wrench.



PATENTED AUG. 8, 1905.

A. SIENEGH. MONKEY WRENCH.

APPLICATION FILED JAN. 10, 1905.

mnnw u. GRAHAM co., PNOYOUYHDGRAPNERS WASHINGYUN. n c.

PATENT OFFICE.

AUGUST STENEOH, OF LAFAYETTE, COLORADO.

MONKEY WRENCH- Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed January 10, 1905. Serial No. 240,517.

1'0 a LU/1107R- it may concern.-

Be it known that I, AUGUST STENECH, a citi- Zen of Austria-Hungary, residing in the city of Lafayette, county of Boulder, and State of Colorado, have invented certain new and useful Improvements in Monkey-Wrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, referencev being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in monkey-wrenches, my object being to provide a device of this class which shall be simple in construction, economical in cost, reliable, durable, and efiicient in use; and to these ends the invention consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of my improved wrench. Fig. 2 is a rear view of the same or a view looking in the direction of arrow 2 in Fig. 1. Fig. 3 is an underneath view of the locking device. Fig. t is a rear view illustrating a form of ratchet somewhat different from that illustrated in Fig. 2. I

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the bar of the wrench, to one extremity of which is attached a stationary jaw 6. One edge of the bar 5 is provided with ratchet-teeth 7 adapted to be engaged by the tooth 8 of a locking-arm 9, pivotally mounted on the jaw 10, which is slidable on the bar. As shown in the drawings, a screw-pin 12 is employed for the purpose of pivotally connecting the locking-arm 9 with the jaw 10. This arm is preferably provided with a lug or thumb-piece 13 to facilitate its movement. In Fig. 2 the ratchetteeth 7 are inclined or extend at a slight angle to the length of the bar, whereby as the tooth 8 of the locking device engages a ratchettooth moving in the direction indicated by arrow a in Fig. 2 there is a wedging action, causing the locking-arm to be tightly secured in place. However, if desired, the ratchetteeth may be straight or at right angles to the bar, as shown in Fig. 4. The locking-arm 9 is provided with a shoulder 9 on its under side adjacent the sliding jaw, which acts as a stop to prevent the locking device from moving too far. As shown in the drawings, this shoulder is curved, as indicated by dotted lines in Fig. 2. This feature prevents the locking-arm from moving farther than is necessary, as will be readily understood.

From the foregoing description the use and operation of my improved device will be readily understood. When it is'desired to move the sliding jaw 10 upon the bar 5, the locking device 9 is thrown to the dotted-line position in Fig. 2. The sliding jaw may then be moved in either direction at will. After it has been properly adjusted the locking-arm is thrown to engagement with a ratchet-tooth of the bar, whereby the sliding jaw is locked in the desired position. The device is then ready for use.

Having thus described my invention, what I claim is 1. In a wrench, the combination of a bar provided with a jaw projecting from one edge thereof and having ratchet-teeth on the opposite edge thereof, a jaw slidable on the bar and cooperatingwiththejawofthelatter,alockingarm pivotally connected with the sliding jaw adjacent the teeth of the bar, the arm having a tooth adapted to engage the ratchet-teeth of the bar, the arm being also provided with a shoulder projecting from the same surface as the tooth but shorter than the latter, this shoulder serving to engage the body of the sliding jaw as the pivoted arm is thrown to the unlocked position whereby the arm is prevented from moving farther than is required.

2.- In a wrench, the combination of a bar provided with a jaw projecting from one edge thereof and having ratchet-teeth on the opposite edge thereof, a jaw slidable on the bar and cooperating with the jaw of the latter, a locking-arm pivotally connected with the sliding jaw adjacent the teeth of the bar, the arm having a tooth adapted to engage the ratchetteeth of the bar, the arm being also provided with a curved shoulder adapted to engage a sliding jaw and form a stop against further movement when the arm is thrown to the unlocked position in either direction.

In testimony whereof I affix my signature in presence of two witnesses.

AUGUST STENECH.

Witnesses:

A. J. OBRIEN, HENRY MARGONI. 

